| 摘要 |
PURPOSE:To contrive to miniaturize and lighten an apparatus itself and to lower its power consumption by horizontally and vertically deflecting (n)-laser beams having the same wavelength modulated through (n)-kinds of pattern information signal components and by spatially separating the (n)-laser beams to directly draw a pattern information on a plurality of drawing mediums. CONSTITUTION:Because three laser beams l1, l2, and l3 having the same wavelength respectively modulated through three kinds of pattern information signal components are formed into flat shapes by a lens system composed of cylindrical lenses 1, 2, 4-6 and a half-wave plate 3 and the pitch of arrangement of respective laser beams l1, l2, and l3 is made small, one acousto-optical deflecting system 7 can be used as a horizontal deflection means. Also, because the three laser beams l1, l2, and l3 having the same wavelength modulated through respective picture signal components of red, green and blue colors are spatially separated by mirrors 12a, 12b and 12c and a galvanomirror 13, light valves 15R, 15G and 15B can be respectively made to draw pictures relative to red, green and blue colors simultaneously and a cathode-ray tube becomes unnecessary though three are merely provided respectively one horizontal and vertical deflection means. |
